Flask



FIG. 1 is a front perspective view of a flask showing my new design;

FIG. 2 is a left side elevational view thereof

FIG. 3 is a rear elevational view thereof

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dashed lines in FIGS. 1–5 are shown for illustrative purposes and form no part of the claimed design. 

The ornamental design for a flask, as shown and described. 